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Circular polarization satellite navigation antenna, preparation method and antenna circuit

A technology of satellite navigation antenna and antenna circuit, which is applied in the direction of antenna, antenna grounding switch structure connection, electrical components, etc. It can solve the problems of low circular polarization bandwidth, narrow impedance bandwidth, and difficulty in satisfying satellite navigation receivers, etc., and achieve electric field Evenly distributed, the effect of increasing bandwidth and gain

Active Publication Date: 2012-11-21
BEIJING METABTAR RADAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of realizing the present invention, the inventors of the present invention found that the planar structure of the planar printed antenna in the wireless communication terminal equipment has narrow impedance bandwidth, circular polarization bandwidth and low elevation gain, which is difficult to satisfy Requirements for satellite navigation receivers

Method used

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  • Circular polarization satellite navigation antenna, preparation method and antenna circuit
  • Circular polarization satellite navigation antenna, preparation method and antenna circuit
  • Circular polarization satellite navigation antenna, preparation method and antenna circuit

Examples

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preparation example Construction

[0068] In the preparation method provided by the present invention, a microstrip line is etched on one side of a double-sided microwave substrate to form an N equal power division phase shifter, the surface is brushed with a layer of anti-oxidation coating as the top surface, and the other side is subjected to conductive treatment as the bottom surface. Connect the bottom surface of the double-sided microwave substrate to the metal ground plate, and connect the short sides of N L-shaped feed probes of the same size to the two outputs of the N equal power divider phase shifter located on the top surface of the double-sided microwave substrate. The end is connected and perpendicular to the double-sided microwave substrate, and at the same time, the N long sides of the N L-shaped feeding probes are mutually 90°, and the first circular patch is insulated and fixedly connected to the double-sided microwave substrate. And located above N L-shaped feeding probes of the same size, and ...

Embodiment 1

[0072] This embodiment mainly describes a circular polarization satellite navigation antenna circuit.

[0073] An N equal power dividing phase shifter, N L-shaped feeding probes of the same size and a first circular patch.

[0074] The short sides of N L-shaped feed probes are respectively connected to the N output terminals of N equal power divider phase shifters, and the long sides are 90° to each other. The first circular patch is placed on N L-shaped feed probes , and the intersection of the long side extension lines of the N L-shaped feeding probes is on the central axis of the first circular patch.

[0075] The N equal power divider phase shifter divides the input energy into N signals with the same amplitude and 90° phase difference, and the N signals are respectively coupled and fed to the first circular patch through N L-shaped feeding probes.

[0076] When N is two, figure 1 It is a top view of a circularly polarized satellite navigation antenna circuit, figure 2...

Embodiment 2

[0090] This embodiment mainly illustrates a method for preparing a circularly polarized satellite navigation antenna.

[0091] Etching microstrip lines on one side of a double-sided microwave substrate to form an N equal power division phase shifter, brushing a layer of anti-oxidation coating on the surface as the top surface, and conducting conductive treatment on the other side as the bottom surface.

[0092] When N is two, such as figure 1 As shown, etched on a double-sided microwave substrate figure 1 The microstrip line of the shape shown in the halving power divider phase shifter 101 is composed of a feed network formed by cascading the halving power divider and the 90° phase shifter.

[0093] When N is four, such as image 3 As shown, etched on double-sided microwave substrate image 3 The microstrip line of the shape shown in constitutes a quarter power divider phase shifter 301, and a first-stage feed network is formed by cascading two power dividers and a 180° pha...

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Abstract

The invention discloses a circular polarization satellite navigation antenna, a preparation method and an antenna circuit. The circular polarization satellite navigation antenna circuit is characterized by comprising one N equally-divided power phase shifter, N L-shaped feed probes with the same size and a first circular patch, wherein short edges of the N L-shaped feed probes are respectively connected with N output ends of the N equally-divided power phase shifter, long edges of the L-shaped feed probes are vertical to one another, the first circular patch is arranged above the L-shaped feed probes, the intersected point of extension lines of long edges of the N L-shaped feed probes is located on the central axis of the first circular patch, the input energy is divided by the N equally-divided power phase shifter into N circuits of signals with identical amplitudes and 90-DEG phase difference, the N circuits of signals are respectively coupled and fed to the first circular patch through the N L-shaped feed probes, and N is two or four. The invention also provides the circular polarization satellite navigation antenna and the preparation method. The antenna can provide higher circular polarization bandwidth, gain and axial ratio and can be applied to a terminal device of a satellite navigation system.

Description

technical field [0001] The invention relates to the technical field of microwave antennas, in particular to a circular polarization satellite navigation antenna, a preparation method and an antenna circuit. Background technique [0002] In recent years, satellite navigation technology has been widely used. The commonly used satellite navigation systems are mainly global position system (GPS) and Galileo (Galileo) system. China's Compass system has also served the society. Due to the limited satellite distribution of each navigation system in space, it cannot cover all areas on the earth, so its positioning and navigation accuracy, safety reliability and availability are also restricted. In order to improve the positioning accuracy and solve the single system For the problem of coverage blind spots, a mode compatible with multiple satellite navigation systems will be adopted. The antenna is an important part of the satellite navigation system, and will play a decisive role i...

Claims

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Application Information

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IPC IPC(8): H01Q23/00H01Q1/36H01Q1/50
Inventor 左申正王恩成刘宁波张昌杨建城
Owner BEIJING METABTAR RADAR
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